I know that the Kings, didn't play well with the Spurs in the regular season, but they were getting hot in the postseason. And the regular season is just the regular season. Its a totally different element if you only focus on one team. Sac town would have taken the Spurs. They were rolling, until Webber got hurt. A Webber-less Sac town still took the Mavs to 7.
Also, its all about the match-up. As you can see the Nets are hanging on because they match up well with the Spurs. Having multiple options disrupts the Spurs. The Kings can score at will and can play terrific D. I think people are giving too much credit to the Spurs right now, for beating the Lakers. I'll admit it, the Lakers would have gotten beat bad by the Kings this year with a healthyWebber.
From the looks of these Finals, the Kings would have killed the Spurs.